What's On Tonight: Masterpiece, Design Star, Army Wives

• At 8, CBS has the premiere of Big Brother.
• Food Network has a new Challenge at 8.
• At 9, NBC has Miss Universe 2008.
• At 9, PBS has a new Masterpiece.
• USA has a new Law and Order: CI at 9, then a new In Plain Sight.
• HBO has the premiere of Generation Kill at 9.
• TLC has a new Singing Office at 9.
• A&E has a new Gene Simmons' Family Jewels at 9, followed by a new Two Coreys.
• History Channel has a new Ice Road Truckers at 9.
• HGTV has a new Design Star at 9.
• At 10, Lifetime has a new Army Wives.
• Food Network has a new Next Food Network Star at 9.
• At 11:30, Cartoon Network has a new Venture Brothers.
• Showtime has a new I Can't Believe I'm Still Single at 11:30.

Check your local TV listings for more.